If we can't have original races could we at least have a wide variety of varients? If you do manage to build us a rich and culturally diverse world then don't just give us "elves", "dwarves", "humans", but let us choose from a range of different cultural groups too, with actual roleplaying implications.
In truth I'd love a game with none of these. They all carry too much creative baggage. I want a world that's fresh, where humans have already warred themselves into extinction, bloodthirsty tribes of dwarven cannibals infest the jungles, elves are a sub-intelligent slave race, and the instead the playable races include living constructs, elementals, mantis-people, and shape-shifting amoeboids. All with their own original cultures that are believable outcomes of the history of the world and its people, rather than well-worn and rebadged archetypes.